[Android Head-Units] kaween:
Let me try and answer as far as I can. Only toyed with it for a couple of hours so far outside my car.

AH : AND THIS IS ABOUT THE HIFIMAX/D62/I802/S150 Unit for all clarity. :)

1) SWC works, But you need a resistive steering wheel stalk or you have to build an adapter that does that for you (translate the buttons into resistive values). I've done a couple of quick tests on it, and I can definitly get a connected "resistor value X" to "action Y". Now, most modern cars with a SWC either have some kind of protocol running between their stalk and the original car radio, or they have a selection of 0/1 switcheds which are translated into the correct action by the official radio which the manufacturer provides. Resistive value SWC's are few and far between on modern cars I think. And if your car does Canbus, the story is totally different too. If you want, I can give you some hints showing how I did it on my car , but unless you find some ready-made conversion module, there's a bit of DIY work involved.

Mine was sold as "universal unit" so I had no harness, and had to build/wire it myself for my car. The audio part is pure Iso A/B, but the remote was a sepperate Mini-Iso 6 pin connector in my car, for which had had to build that resistive learning thingy so "button X" didn't just give a "0" or "1" but really a specific value which the radio can measure and lets it act accordingly.

On my first China Headunit, I had bought a "Connect2S" module to do that. Stupid thing went belly-up after 3 weeks, and I read a lot of crap about these modules then where it turned out I was not the only one. I was so disgusted I didn't even bother to contact the seller, I just build my own interface.

I did a quick search, and you'll probably need somthing like this http://www.metraonline.com/files/catalogs/Steering_Wheel_Control_Interfaces.pdf to make it work on your car.

Unless the unit was sold to you as "product is designed to let SWC work out of the box": in that case, contact your reseller.

2) Remote works perfectly. I have no idea where the sensor is hidden, but it must be there somewhere as the remote shows no issues. Not to insult you : did you check the battery of your remote and first of all, did you remove the plastic battery protection clip ? Remote also works on new installed apps (Poweramp for example), very glad it did.

PS : located it in the little door which hides the two memory slots, at least on the Universal version of the S150 like my Hifimax 1802G. :) If I cover that door with a piece of cardboard, pressing the remote doesn't do anything anymore. But contrary to all other headunits I've see so far, there's no visable IR "eye" on the front. Result may vary : the S150 series is build in a large array of versions and variations for different cars, I only know the "Universal 2Din" version of it.

3) Bwah, I don't know for sure if rooting would help all that much. Just like on my cheap China tablets or phones, I'll force an APK download from external sources, and most of the times those "incompatible" apps run perfectly. I'm sure there must be smarter solutions to this, but I'm too stupid/lazy to look into them till I need them.

4) Rooting works. Download and install Framaroot 1.4.1 on USB/SD whatever. Run it. Select option 1, after that option 2. Reboot. Root checker donwload from Market : confirmed SU availability and buysbox installation. Root access and system volume access are present. Not working from the first time ? Use option 3 (Unroot) to get back to "normal" and try again. If need be, reboot between step 1 and 2. OTG doesn't work out of the box. Gavroche said he got it to work after rooting his unit, I myself lack the knowledge to add OTG.

5) yup, noticed that too and was already stated by "Gavroche" (dude ! Where are you ? We need you here ! :) ). Not an issue for me ... yet. But it would be nice to know what app you're refering to exactly for future reference.

6) Still in my basement testing the rig. Good to hear. GPS Reception in my basement : ZERO. :)

7) I sideload all navi software. Always. :)

8) I definilty get rear view long BEFORE Android is booted. Power up, rear view camera is present the moment the reverse line goes up. Well within a second after power up. If you hooked up the "Back" line correctly (to the positive side of your reverse light, so the control line goes to 12V when you shift the car in reverse), you shouldn' have to wait for the radio fully boot.

9) Don't have that problem, at least not between Radio and the pre-installed player, but also not with PowerAmp which is about the only music player I use on android. Ah, and remote works too there. In worst case, the radio will still play when PowerAmp is selected as Poweramp is in a "Pause" state when selected. Press "Play" and Radio sound goes away while Poweramp does its thing. Switching back to Radio : no problem either.

10) Primary reason for me to have a BT headunit. If you get caught here on the road making a call without handsfree system, the penalties are substantial. 2 of them will cost more than a complete headunit. :)

On the issue of RDS : the "RDS Data Window" is very, very small. 10 Characters wide or something. Stupid. Secondly, I noticed that if you do a "fast forward seek" and the Station you pick up is not in your Station list, the RDS data often will show the RDS name of the station the radio was on before you started to seek. If the Radio picks up a station that's present in your frequency list already, the RDS name/data is always displayed correctly.

Hope that helps a bit.